Test fixture
By designing a test fixture that includes a base plate, a positioning device, and a force measuring device, the problem of high testing cost for headphone sliding arms was solved, achieving low-cost and efficient testing of sliding arm extension force, and improving testing accuracy and yield rate.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHAOQING DEQING GRANDSUN ELECTRONIC CO LTD
- Filing Date
- 2025-04-11
- Publication Date
- 2026-05-08
AI Technical Summary
Existing headphone sliding arm extension force testing equipment is expensive, occupies a large space, and requires electrical configuration.
Design a test fixture, including a base plate, a first positioning device, a force measuring device, and a second positioning device. By clamping and pressing the sliding arm, the force measuring device pushes the sliding arm to extend and retract, and displays the magnitude of the thrust during the sliding process, ensuring that the sliding arm is not damaged within a preset force value range.
It achieves low-cost and efficient sliding arm extension force testing, improves testing accuracy and yield rate, and has a simple structure, small size and easy assembly.
Smart Images
Figure CN224218515U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of headphone testing equipment technology, and in particular to a testing fixture. Background Technology
[0002] The tension of the sliding arm in headphones is crucial to user experience. Excessive tension makes extension and retraction difficult, while insufficient tension causes the earpiece to slip off easily. Therefore, headphone manufacturers conduct sliding arm extension force tests to ensure consistent tension or a reasonable range. Current headphone sliding arm extension force testing utilizes a rotary motor with sensors. This testing equipment is expensive, requires significant space, and necessitates electrical configuration, resulting in high testing costs. Utility Model Content
[0003] The main purpose of this utility model is to propose a test fixture, which aims to solve the technical problem of high testing cost in the current sliding arm extension force test.
[0004] To achieve the above objectives, this utility model proposes a test fixture for testing the extension force of the sliding arm of a headset, the test fixture comprising:
[0005] A base plate having a mounting wall surface, wherein a slide rail is provided through the base plate;
[0006] A first positioning device is disposed on the mounting wall surface and is adapted to clamp the sliding arm along a first direction.
[0007] A force measuring device is disposed on the mounting wall and configured to slide along the slide rail, and the force measuring device is provided with a connecting rod;
[0008] A second positioning device is connected to the end of the connecting rod and is adapted to press the sliding arm along a second direction perpendicular to the first direction.
[0009] The force measuring device is configured to push the sliding arm to extend or retract when subjected to force, and the sliding path of the force measuring device and the sliding arm are concentric.
[0010] In some embodiments, the first positioning device includes:
[0011] A first positioning plate is connected to the mounting wall surface;
[0012] A second positioning plate is driven by a driving member, the driving member being configured to drive the second positioning plate to move toward or away from the first positioning plate;
[0013] Wherein, after the second positioning plate moves toward the first positioning plate, it can form a clamping groove with the first positioning plate, and the clamping groove is used to accommodate the sliding arm.
[0014] In some embodiments, the first positioning plate and the second positioning plate have the same curvature so that an arc-shaped clamping groove is formed between the first positioning plate and the second positioning plate, the arc-shaped clamping groove being adapted to the curvature of the sliding arm.
[0015] In some embodiments, the mounting wall is provided with a limiting hole, the first positioning device includes a mounting plate, the mounting plate is provided with a limiting groove, the limiting groove and the limiting hole are aligned, and a connector is passed through the limiting groove and the limiting hole, the connector being used to position the mounting plate on the mounting wall;
[0016] The driving component is disposed on the mounting plate, and the relative position between the limiting groove and the limiting hole is adjustable so that the driving component can move toward or away from the first positioning plate.
[0017] In some embodiments, the second positioning device includes an adjustment knob and a positioning pressure plate, the adjustment knob being configured to adjust the positioning pressure plate to move along the second direction and the opposite direction of the second direction, so that the positioning pressure plate presses against or releases the sliding arm.
[0018] In some embodiments, a push rod is provided on the side of the force measuring device away from the connecting rod.
[0019] In some embodiments, along the sliding path of the force measuring device, the mounting wall is provided with a sliding plate, which is used to reduce the friction between the force measuring device and the mounting wall.
[0020] In some embodiments, the end of the connecting rod is provided with a first hinge hole, the second positioning device is provided with a second hinge hole, and a hinge shaft passes through the first hinge hole and the second hinge hole to hinge the second positioning device to the connecting rod.
[0021] In some embodiments, a rolling element is provided on the side of the force measuring device near the mounting wall, and the end of the rolling element away from the force measuring device is connected to the slide rail so that the force measuring device can slide along the slide rail.
[0022] In some embodiments, the rolling element includes a connecting post and a ball bearing, the connecting post being connected to the force measuring device and the ball bearing being connected within the slide rail.
[0023] Compared with the prior art, the beneficial effects of this utility model are:
[0024] In the technical solution of this utility model, during the testing of the telescopic force of the sliding arm, firstly, a first positioning device clamps the sliding arm along a first direction, restricting its degree of freedom in that direction. Then, a second positioning device presses the sliding arm along a second direction, further restricting its degree of freedom in that direction. This ensures the sliding arm is stably positioned on the base plate and prevents it from wobbling under load. Next, a driving force is applied to the force measuring device, causing it to slide along the slide rail and push the sliding arm to extend and retract during this process. The force measuring device displays the magnitude of the thrust during this extension and retraction process, ensuring the sliding arm remains undamaged within a preset force range. This completes the telescopic test of the sliding arm and improves the yield rate of the headphones. In addition, since the overall structure of the sliding arm is arc-shaped (the sliding arm should conform to the shape of the human head), the sliding path of the force measuring device and the sliding arm are concentric, so that when the force measuring device pushes the sliding arm, the sliding arm can extend and retract in the manner of normal use, thereby ensuring that the testing method meets the needs of daily use and improving the testing accuracy of the test fixture for the sliding arm.
[0025] The test fixture provided by this utility model has a simple structure, small overall size, and few components, making it easy to assemble. The components can be installed and assembled using simple bolt connections. In actual operation, after the sliding arm is positioned on the base plate using the first and second positioning devices, the extension and retraction test of the sliding arm can be completed using the force measuring device, allowing testers to perform the test simply and efficiently. Furthermore, the structural components of the test fixture provided by this utility model (such as the base plate, the first positioning device, the force measuring device, and the second positioning device) are all relatively conventional structures in the field, resulting in low cost and effective savings in testing expenses. Attached Figure Description
[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0027] Figure 1A schematic diagram of the overall structure of the test fixture provided in an embodiment of the present invention from a first perspective;
[0028] Figure 2 for Figure 1 Exploded view of a portion of point A in the middle;
[0029] Figure 3 A schematic diagram of the overall structure of the test fixture provided in an embodiment of the present invention from a second perspective;
[0030] Figure 4 A schematic diagram of the overall structure of the test fixture provided in an embodiment of the present invention from a third-person perspective;
[0031] Figure 5 This is a schematic diagram of the structure of the base plate in a test fixture provided in an embodiment of the present invention;
[0032] Figure 6 This is a schematic diagram of the structure of the first positioning device in a test fixture provided in an embodiment of the present invention;
[0033] Figure 7 An exploded view showing the connection relationship between the force measuring device and the base plate in a test fixture provided in an embodiment of this utility model;
[0034] Figure 8 This is a schematic diagram of the structure of the rolling element in a test fixture provided in an embodiment of the present invention;
[0035] Figure 9 A schematic diagram of the overall structure of the test fixture after the sliding arm is installed in an embodiment of the present invention;
[0036] Figure 10 for Figure 9 A magnified view of a section at point B.
[0037] Explanation of icon numbers:
[0038] 10. Test fixture;
[0039] 20. Sliding arm;
[0040] 100. Base plate;
[0041] 110. Mounting wall surface; 120. Slide rail; 130. Limiting hole; 140. Sliding plate;
[0042] 200. First positioning device;
[0043] 210. First positioning plate; 220. Second positioning plate; 230. Driving component; 240. Clamping groove; 250. Mounting plate;
[0044] 251. Limiting groove;
[0045] 300. Force measuring device;
[0046] 310. Connecting rod; 320. Push rod;
[0047] 311. First hinge hole;
[0048] 400. Second positioning device;
[0049] 410. Adjusting knob; 420. Positioning plate; 430. Second hinge hole;
[0050] 500, hinge shaft;
[0051] 600. Rolling parts;
[0052] 610. Connecting post; 620. Ball bearing;
[0053] X, first direction;
[0054] Y, the second direction.
[0055] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0056] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0057] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.
[0058] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or," "and / or," or "and / or" throughout the text implies three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where A and B are simultaneously satisfied. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0059] The tension of the sliding arm in headphones is crucial to user experience. Excessive tension makes extension and retraction difficult, while insufficient tension causes the earpiece to slip off easily. Therefore, headphone manufacturers conduct sliding arm extension force tests to ensure consistent tension or a reasonable range. Current headphone sliding arm extension force testing utilizes a rotary motor with sensors. This testing equipment is expensive, requires significant space, and necessitates electrical configuration, resulting in high testing costs.
[0060] Based on this, in order to solve the technical problem of high testing cost for the current sliding arm 20 telescopic force test, referring to Figures 1 to 10This utility model provides a test fixture 10 for testing the extension force of a sliding arm 20 of a headset. The test fixture 10 includes a base plate 100, a first positioning device 200, a force measuring device 300, and a second positioning device 400. The base plate 100 has a mounting wall 110, and a slide rail 120 penetrating the base plate 100 is provided on the mounting wall 110. For example, the slide rail 120 can be an arc-shaped slide rail 120. The first positioning device 200 is disposed on the mounting wall 110 and is adapted to clamp the sliding arm 20 along a first direction X. For example, the first direction X can be transverse, meaning the first positioning device 200 can clamp the sliding arm 20 transversely. A force measuring device 300 is mounted on the mounting wall 110 and is configured to slide along a slide rail 120. If the slide rail 120 is an arc-shaped slide rail 120, the force measuring device 300 can slide in an arc shape along the slide rail 120. The force measuring device 300 is provided with a connecting rod 310, which can be used to connect other components. A second positioning device 400 is connected to the end of the connecting rod 310. The second positioning device 400 is adapted to press the sliding arm 20 along a second direction Y perpendicular to the first direction X. For example, the second direction Y can be vertical, that is, the second positioning device 400 can press the sliding arm 20 vertically. Through the first positioning device 200 and the second positioning device 400, the degrees of freedom of the sliding arm 20 in multiple directions can be restricted, ensuring the positioning stability of the sliding arm 20 during the test. The force measuring device 300 is configured to push the sliding arm 20 to extend or retract after being subjected to force, and the sliding path of the force measuring device 300 and the sliding arm 20 are concentric.
[0061] Specifically, in this embodiment, during the testing of the extension force of the sliding arm 20, firstly, the first positioning device 200 clamps the sliding arm 20 along the first direction X, thus restricting the degree of freedom of the sliding arm 20 in the first direction X. Then, the second positioning device 400 presses the sliding arm 20 along the second direction Y, thus restricting the degree of freedom of the sliding arm 20 in the second direction Y, ensuring that the sliding arm 20 can be stably positioned on the base plate 100 and that the sliding arm 20 will not wobble under force. Next, a driving force is applied to the force measuring device 300, allowing it to slide along the slide rail 120 and push the sliding arm 20 to extend and retract during this process. During the extension and retraction of the sliding arm 20, the force measuring device 300 displays the magnitude of the pushing force, ensuring that the sliding arm 20 will not be damaged within the preset force range. This completes the extension and retraction test of the sliding arm 20, improving the yield rate of the headphones. Furthermore, since the overall structure of the sliding arm 20 is arc-shaped (the sliding arm 20 should conform to the shape of the human head), the sliding path of the force measuring device 300 and the sliding arm 20 are concentric, so that when the force measuring device 300 pushes the sliding arm 20, the sliding arm 20 can extend and retract in the manner of normal use, thereby ensuring that the testing method meets the needs of daily use and improving the testing accuracy of the test fixture 10 on the sliding arm 20.
[0062] The test fixture 10 provided in this embodiment has a simple structure, small overall size, few components, and is easy to assemble. The components can be installed and assembled using simple bolt connections. In actual operation, after the sliding arm 20 is positioned on the base plate 100 using the first positioning device 200 and the second positioning device 400, the extension and retraction test of the sliding arm 20 can be completed using the force measuring device 300, allowing testers to complete the test simply and efficiently. Furthermore, the structural components in the test fixture 10 provided in this embodiment (such as the base plate 100, the first positioning device 200, the force measuring device 300, and the second positioning device 400) are all relatively conventional structures in the art, so the cost of this test fixture 10 is low, effectively saving testing costs.
[0063] In some embodiments, refer to Figure 6The first positioning device 200 includes a first positioning plate 210 and a second positioning plate 220. The first positioning plate 210 is connected to the mounting wall 110 (for example, both the first positioning plate 210 and the mounting wall 110 may have threaded holes, and a detachable connection between the first positioning plate 210 and the base plate 100 can be achieved by bolts passing through the threaded holes, thereby facilitating the installation and removal of the first positioning plate 210 and the base plate 100). The second positioning plate 220 is driven by a driving member 230, which is configured to drive the second positioning plate 220 to move toward or away from the first positioning plate 210. When the second positioning plate 220 moves toward the first positioning plate 210, it forms a clamping groove 240 with the first positioning plate 210, which is used to accommodate the sliding arm 20.
[0064] Specifically, in this embodiment, a specific structure of a first positioning device 200 is provided. Before positioning the sliding arm 20 on the base plate 100, the driving member 230 drives the second positioning plate 220 to move away from the first positioning plate 210, so that there is a large gap between the second positioning plate 220 and the first positioning plate 210. That is, at this time, the clamping groove 240 has a wide opening, so as to facilitate the placement of the sliding arm 20 in the clamping groove 240. After the sliding arm 20 is placed in the clamping groove 240, the driving member 230 drives the second positioning plate 220 to move closer to the first positioning plate 210, so that there is a small gap between the second positioning plate 220 and the first positioning plate 210. That is, at this time, the clamping groove 240 has a narrow opening, so as to ensure that the first positioning plate 210 and the second positioning plate 220 stably clamp the sliding arm 20 in the clamping groove 240 and prevent the sliding arm 20 from moving during testing.
[0065] More preferably, in order to prevent the first positioning plate 210 and the second positioning plate 220 from scratching the surface of the sliding arm 20, the contact surfaces of the first positioning plate 210 and the sliding arm 20, as well as the contact surfaces of the second positioning plate 220 and the sliding arm 20, can be provided with flexible materials such as sponge pads, which can provide elastic protection for the sliding arm 20.
[0066] In some embodiments, refer to Figure 6 The first positioning plate 210 and the second positioning plate 220 have the same curvature so that an arc-shaped clamping groove 240 is formed between the first positioning plate 210 and the second positioning plate 220, and the arc-shaped clamping groove 240 is adapted to the curvature of the sliding arm 20.
[0067] Specifically, in this embodiment, the sliding arm 20 has a curved arc that conforms to the human head. By designing the clamping groove 240 formed between the first positioning plate 210 and the second positioning plate 220 as an arc-shaped clamping groove 240, it is beneficial to ensure that the clamping groove 240 conforms more closely to the shape of the sliding arm 20. This helps to reduce the gap between the sliding arm 20 and the first positioning plate 210 and the second positioning plate 220 when the sliding arm 20 is clamped in the clamping groove 240, thereby improving the clamping degree of the first positioning plate 210 and the second positioning plate 220 on the sliding arm 20.
[0068] In some embodiments, refer to Figures 4 to 6 The mounting wall 110 is provided with a limiting hole 130. The first positioning device 200 includes a mounting plate 250, which is provided with a limiting groove 251 (e.g., the limiting groove 251 can be an oblong hole). The limiting groove 251 and the limiting hole 130 are aligned. A connector (e.g., a bolt) passes through the limiting groove 251 and the limiting hole 130. The connector is used to position the mounting plate 250 on the mounting wall 110. A driving member 230 is disposed on the mounting plate 250. The relative position between the limiting groove 251 and the limiting hole 130 is adjustable so that the driving member 230 can move towards or away from the first positioning plate 210.
[0069] Specifically, in this embodiment, the thickness of the sliding arm 20 varies during actual production. To improve the versatility of the test fixture 10 and ensure that it can be applied to sliding arms 20 of different thicknesses, the first positioning device 200 is configured as an adjustable structure. When the thickness of the sliding arm 20 is thinner, the opening of the clamping groove 240 required to clamp the sliding arm 20 is narrower. At this time, the relative position between the limiting groove 251 and the limiting hole 130 can be adjusted so that the mounting plate 250 drives the driving member 230 to move closer to the first positioning plate 210. Since the driving component 230 can drive the second positioning plate 220 to move closer to or further away from the first positioning plate 210, after the mounting plate 250 drives the driving component 230 to move closer to the first positioning plate 210, the second positioning plate 220 can also move closer to the first positioning plate 210. This makes the opening of the clamping groove 240 formed between the first positioning plate 210 and the second positioning plate 220 narrower, ensuring that the thinner sliding arm 20 can be stably clamped in the narrower clamping groove 240.
[0070] Similarly, when the sliding arm 20 is thicker, the opening of the clamping groove 240 required to clamp the sliding arm 20 is wider. At this time, the relative position between the limiting groove 251 and the limiting hole 130 can be adjusted so that the mounting plate 250 drives the driving member 230 to move away from the first positioning plate 210. Since the driving member 230 can drive the second positioning plate 220 to move closer to or away from the first positioning plate 210, after the mounting plate 250 drives the driving member 230 to move away from the first positioning plate 210, the second positioning plate 220 can also move away from the first positioning plate 210. This makes the opening of the clamping groove 240 formed between the first positioning plate 210 and the second positioning plate 220 wider, ensuring that the thicker sliding arm 20 can be stably clamped in the wider clamping groove 240.
[0071] Therefore, by adjusting the first positioning device 200, it is possible to ensure that the test fixture 10 clamps sliding arms 20 of different thicknesses, thereby improving the versatility of the test fixture 10 and reducing the testing cost of the sliding arms 20.
[0072] In some embodiments, refer to Figure 1 , Figure 2 , Figure 9 as well as Figure 10 The second positioning device 400 includes a knob 410 and a positioning plate 420. The knob 410 is configured to adjust the positioning plate 420 to move along the second direction Y and the opposite direction of the second direction Y, so that the positioning plate 420 presses against or releases the sliding arm 20.
[0073] Specifically, in this embodiment, a specific structure of the second positioning device 400 is provided. Before positioning the sliding arm 20 on the base plate 100, the adjusting knob 410 is turned clockwise, causing the adjusting knob 410 to drive the positioning pressure plate 420 to move in the second direction Y, thereby increasing the distance between the positioning pressure plate 420 and the target position and ensuring that the positioning pressure plate 420 is in a clearance position, thus ensuring that the sliding arm 20 can be smoothly placed in the target position. After the sliding arm 20 is positioned in the target position, the adjusting knob 410 is turned counterclockwise, causing the adjusting knob 410 to drive the positioning pressure plate 420 to move in the opposite direction of the second direction Y, thereby decreasing the distance between the positioning pressure plate 420 and the target position and ensuring that the positioning pressure plate 420 can press the sliding arm 20 tightly.
[0074] In some embodiments, refer to Figure 1 , Figure 3 , Figure 4 , Figure 7 as well as Figure 9A push rod 320 is provided on the side of the force measuring device 300 away from the connecting rod 310. During the extension and retraction test of the sliding arm 20, the operator can hold the push rod 320 and slide the force measuring device 300, causing the force measuring device 300 to push the sliding arm 20 to extend or retract. The operator can then determine whether the sliding arm 20 is within a reasonable force range based on the reading displayed on the force measuring device 300. By using the push rod 320, not only is time and effort saved, but the operator can also easily control the sliding direction of the force measuring device 300, improving the accuracy of the force measuring device 300 when extending or retracting the sliding arm 20. Preferably, a rubber layer can be provided on the rod body of the push rod 320, allowing the operator's hand to rest on the rubber layer, thereby improving the operator's comfort when holding the push rod 320.
[0075] In some embodiments, refer to Figure 1 , Figure 4 , Figure 5 , Figure 7 as well as Figure 9 Along the sliding path of the force measuring device 300, a sliding plate 140 is provided on the mounting wall 110. The sliding plate 140 is used to reduce the friction between the force measuring device 300 and the mounting wall 110. For example, the sliding plate 140 can be a metal sliding plate, and the sliding plate 140 can be attached to the mounting wall 110 with double-sided adhesive. Preferably, a lubricant such as lubricant can be applied to the sliding plate 140. By providing the sliding plate 140 on the mounting wall 110, the flexibility of the force measuring device 300 during sliding can be improved, preventing excessive contact friction between the force measuring device 300 and the mounting wall 110 from causing the force measuring device 300 to jam during sliding, thus affecting the accuracy of the extension and contraction test.
[0076] In some embodiments, refer to Figure 2 The connecting rod 310 has a first hinge hole 311 at its end, and the second positioning device 400 has a second hinge hole 430. A hinge shaft 500 passes through the first hinge hole 311 and the second hinge hole 430 to hinge the second positioning device 400 to the connecting rod 310. For example, the second positioning device 400 can press the end of the sliding arm 20 (in practical applications, the end of the sliding arm 20 can extend and retract). The force measuring device 300 can first drive the second positioning device 400 to move, and then the second positioning device 400 can drive the sliding arm 20 to extend and retract. By flexibly connecting the connecting rod 310 and the second positioning device 400, during the process of the force measuring device 300 driving the second positioning device 400 to move, it is possible to prevent the force measuring device 300 from applying a rigid force to the second positioning device 400, causing the second positioning device 400 to forcibly drive the sliding arm 20 to extend and retract, resulting in damage to the sliding arm 20.
[0077] In some embodiments, refer to Figure 7 and Figure 8A rolling element 600 is provided on the side of the force measuring device 300 near the mounting wall 110. The end of the rolling element 600 away from the force measuring device 300 is connected to the slide rail 120, allowing the force measuring device 300 to slide along the slide rail 120. For example, the rolling element 600 may include a connecting post 610 and a ball 620 (e.g., the connecting post 610 and the ball 620 may be an integrally formed structure). The connecting post 610 may be connected to the force measuring device 300 (e.g., the connecting post 610 may be threaded to the force measuring device 300, realizing a detachable connection between the connecting post 610 and the force measuring device 300, so as to facilitate the assembly and disassembly of the connecting post 610 and the force measuring device 300). The ball 620 may be connected to the slide rail 120. The rolling element 600 helps to reduce the contact friction between the force measuring device 300 and the slide rail 120, thereby facilitating the sliding of the force measuring device 300 along the slide rail 120.
[0078] It should be noted that other aspects of the test fixture 10 disclosed in this utility model can be found in the prior art, and will not be repeated here.
[0079] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of this utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.
Claims
1. A test fixture for testing the extension force of the sliding arm of a headset, characterized in that, include: A base plate having a mounting wall surface, wherein a slide rail is provided through the base plate; A first positioning device is disposed on the mounting wall surface and is adapted to clamp the sliding arm along a first direction. A force measuring device is disposed on the mounting wall and configured to slide along the slide rail, and the force measuring device is provided with a connecting rod; A second positioning device is connected to the end of the connecting rod and is adapted to press the sliding arm along a second direction perpendicular to the first direction. The force measuring device is configured to push the sliding arm to extend or retract when subjected to force, and the sliding path of the force measuring device and the sliding arm are concentric.
2. The test fixture according to claim 1, characterized in that, The first positioning device includes: A first positioning plate is connected to the mounting wall surface; A second positioning plate is driven by a driving member, the driving member being configured to drive the second positioning plate to move toward or away from the first positioning plate; Wherein, after the second positioning plate moves toward the first positioning plate, it can form a clamping groove with the first positioning plate, and the clamping groove is used to accommodate the sliding arm.
3. The test fixture according to claim 2, characterized in that, The first positioning plate and the second positioning plate have the same curvature so that an arc-shaped clamping groove is formed between the first positioning plate and the second positioning plate, the arc-shaped clamping groove being adapted to the curvature of the sliding arm.
4. The test fixture according to claim 2, characterized in that, The mounting wall is provided with a limiting hole, the first positioning device includes a mounting plate, the mounting plate is provided with a limiting groove, the limiting groove and the limiting hole are aligned, and a connector is passed through the limiting groove and the limiting hole, the connector being used to position the mounting plate on the mounting wall; The driving component is disposed on the mounting plate, and the relative position between the limiting groove and the limiting hole is adjustable so that the driving component can move toward or away from the first positioning plate.
5. The test fixture according to claim 1, characterized in that, The second positioning device includes an adjustment knob and a positioning pressure plate. The adjustment knob is configured to adjust the positioning pressure plate to move along the second direction and the opposite direction of the second direction, so that the positioning pressure plate presses against or releases the sliding arm.
6. The test fixture according to claim 1, characterized in that, A push rod is provided on the side of the force measuring device away from the connecting rod.
7. The test fixture according to claim 1, characterized in that, Along the sliding path of the force measuring device, a sliding plate is provided on the mounting wall surface, which is used to reduce the friction between the force measuring device and the mounting wall surface.
8. The test fixture according to claim 1, characterized in that, The end of the connecting rod is provided with a first hinge hole, and the second positioning device is provided with a second hinge hole. A hinge shaft passes through the first hinge hole and the second hinge hole to hinge the second positioning device to the connecting rod.
9. The test fixture according to claim 1, characterized in that, The force measuring device is provided with a rolling element on the side near the mounting wall, and the end of the rolling element away from the force measuring device is connected to the slide rail so that the force measuring device can slide along the slide rail.
10. The test fixture according to claim 9, characterized in that, The rolling element includes a connecting column and a ball bearing. The connecting column is connected to the force measuring device, and the ball bearing is connected to the slide rail.